Python client 0.16.1 final release

A final 0.16.1 stable client was released today. This will be the last stable release for a long while as we focus on development of the unstable branch. You can find the changelog at https://github.com/FAForever/client/blob/develop/changelog.md.

Known issues:
* We had reports of some people having trouble using the map vault. For all we can tell this is not the fault of the client, but the server having trouble handling IPv6 connections. Switching to IPv4 should work as a workaround for the time being.
* If you have trouble loading the news sometimes, it’s most likely the WordPress server being sluggish to respond. We hope it will be fixed as the world settles down after the recent huge security updates.